During the operation of packaging machine, short circuit of heat sealing circuit is one of the common equipment failures, which can easily lead to poor sealing, equipment shutdown and even component damage, directly affecting production efficiency and product qualification rate. In response to this industry pain point, XX Factory combined years of technical experience to summarize a set of standardized solutions to help companies quickly locate problems and reduce the recurrence rate of faults.
Analysis of the core causes of short circuit of heat sealing circuit
Short circuit of packaging machine is usually caused by the following factors:
Environmental factors: Workshop dust, humid air or metal debris invade the circuit board, causing abnormal conductivity between lines.
Component aging: Long-term high-load operation causes insulation layer wear and cable cracking, causing local short circuit.
Improper operation: Too high temperature setting or frequent emergency stops accelerate the overload of heating elements and trigger protective circuit breakers.
Four-step method to quickly eliminate short circuit faults
Step 1: Power off to check basic hidden dangers
After turning off the power of the equipment, first check whether there is dust accumulation or liquid leakage around the heat sealing device. Use a dry air gun to clean the circuit board slots and terminal blocks to prevent impurities from causing a short circuit in the packaging machine circuit.
Step 2: Segmented detection to lock the fault point
Use the "partition isolation method" to divide the heat sealing circuit into three parts: power module, temperature control unit, and actuator, and power them on in turn for testing. If a short circuit alarm is triggered when a certain area is powered on, the damaged relay or fuse can be replaced in a targeted manner.
Step 3: Optimize heat dissipation and protection design
Upgrade the circuit board cooling fan and install a heat shield in the high temperature area to reduce the damage to the components caused by thermal stress. At the same time, it is recommended to configure dehumidification equipment in the workshop to reduce the risk of short circuit in the packaging machine circuit from the source.
Step 4: Establish a preventive maintenance mechanism
Regularly use a megohmmeter to test the line insulation resistance to ensure that the value meets the industry safety standards.
Clean the dust inside the equipment every quarter and replace the aging harness and connector.
Operators are trained to set heat sealing temperature and pressure parameters in a standardized manner to avoid overload operation.
Long-term protection: intelligent upgrades reduce failure rates
For high-frequency packaging machine circuit short circuit problems, intelligent temperature control systems and current monitoring modules can be introduced. By collecting circuit load data in real time, the equipment can automatically adjust the power or trigger an early warning before overcurrent, turning passive maintenance into active protection and extending the service life of the heat sealing device.
